Hi, SKZ --
Are you sure it's the PPI that's causing the bloating? Were you on antibiotics for your sinus infection? If you read some of my previous posts, you'll see that I too had a severe sinus infection and was treated with a six-week (!!!) course of antibiotics. I'm convinced the antibiotics caused all my digestive problems, including bloating so bad that I couldn't breathe. It felt like my lungs and diaphragm wouldn't expand. Not to mention the constant belching.
I didn't know about taking probiotics and acidophilus and eating yogurt until I found this board, but since I've started doing that, I've gradually improved. Still not completely normal, but better than I was during the summer. It was in May that I took the antibiotics, and now here it is November and I"m just now remembering what it is to feel good. I've read other members' accounts here also where their regimen of antibiotics caused a bacterial imbalance that took a long time to "right" itself.
The other thing that's helped is taking fiber supplements and Beano before meals. Hope this helps.